Earlier I was watching a video by GTA5Videos on Youtube just to stay updated, and it turns out a new CV has been posted saying the release date for GTA V will be October 2012 according to the CV. Looks legit, considering it also states his work history as a Lead Vehicle Artist for Rockstar.
Link to the CV. Don't know how long it will be up..
https://docs.google....zcEk/edit?pli=1
Video..
Screenshot from GTANF (translated):